CVE-2026-19933Public exploitNetwork attack vector

Code execution via unbounded gets in search_customer

Published Aug 16, 2026 · Updated Aug 16, 2026

Stack overflow in DefaultFuction Customer Relationship Management In C Project 2.0 allows attackers to execute code via crafted search input. The search_customer() function passes a 64-byte stack buffer to gets(), which accepts an unbounded search string and overwrites adjacent stack data. The published proof of concept redirects control flow to the shipped win() shell helper; remote reachability requires a network deployment exposing the terminal search feature.

CVSS severity6.3
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in DefaultFuction Customer Relationship Management In C Project 2.0 allows attackers to execute code via crafted search input. The search_customer() function passes a 64-byte stack buffer to gets(), which accepts an unbounded search string and overwrites adjacent stack data. The published proof of concept redirects control flow to the shipped win() shell helper; remote reachability requires a network deployment exposing the terminal search feature.

The record

CVE
CVE-2026-19933
Published
Aug 16, 2026
Updated
Aug 16, 2026
Vendor
DefaultFuction
Product
Customer Relationship Management In C Project
Classifications
CWE-121, CWE-119, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

DefaultFuction · Customer Relationship Management In C Projectversion=2.0

Published CVSS scores

6.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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